Abstract: Methods for computer generation of graphical user interfaces are disclosed. The interfaces may provide representations of electronic order book data, including prospective orders and the impact of the prospective orders on the order book. Generating the graphical user interfaces can comprise calculating cumulative digital asset purchase order volumes and cumulative digital asset sell order volumes that are available in the order book at each order price. Graphical representations of a prospective order and a post-order order book may be generated and overlaid on the current order book graphical representation.

Abstract: A personal bank card storage device for carrying one or more bank cards, having a housing, a magazine contained within the housing, tracks contained within the magazine, and at least one motor contained within the housing for moving the cards, the device has a key pad, a controller connected to the keypad for reading input from the key pad and operating at least; the invention further includes a method of storing and accessing one or more bank cards for use and includes the steps of providing a personal bank card storage device, inserting one or more bank cards in the container contained within the storage device, programming a personal pass code on a keypad, recalling the personal pass code, entering the personal pass code on the key pad to enable access to the one or more cards.